| 发明名称 |
Progressive lens for specialty and occupational use |
| 摘要 |
A progressive addition lens constructed on the bipolar principle in accordance with a power law having a steeper slope or gradient in the regions adjacent to the poles than in the middle region thereof between the poles.
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| 申请公布号 |
US5327181(A) |
申请公布日期 |
1994.07.05 |
| 申请号 |
US19930003391 |
申请日期 |
1993.01.12 |
| 申请人 |
GENTEX OPTICS, INC. |
发明人 |
WAIDO, RICHARD P. |
| 分类号 |
G02C7/02;(IPC1-7):G02C7/06 |
主分类号 |
G02C7/02 |
| 代理机构 |
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代理人 |
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